Clannad: After Story

Synopsis

Winter comes and some friends come over for New Year's Day. When Kotomi tells her research about 'Another World', Tomoya spontaneously remembers Nagisa's play. Nagisa enters the final months of her pregnancy, but she becomes sick again. On a heavy snowy day, Nagisa goes into labor two weeks early Tomoya and her family, unable to transport her to a hospital in time, is forced to have her give birth at home. After an excruciating process, Nagisa successfully gives birth to their daughter, Ushio, but the delivery and her illness combined take their toll on her and Nagisa dies moments after seeing her newborn baby. Tomoya, who has stayed by her side for the entire time, does not take the sudden turn of events well. His dream of raising their daughter together as a family is shattered. (Source: Wikipedia)